So I was just sitting and musing about poems and I thought about "Antagonish". The opening stanza of that poem would make a really good horror movie or story.
Yesterday, upon the stair,
I met a man who wasn't there.
He wasn't there again today,
I wish, I wish he'd go away...
Ah yes, proof of concept:http://en.wikipedia.org/wiki/Antigonish_%28poem%29
It's been done.
What little bits and bobs do you think would make good plot fodder.